28319920

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4481}}^1$

素因数の和:4573

約数の個数: 40

約数和(自身を含む): 66692160

約数和(自身を除く): 38372240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 4481, 6320, 8962, 17924, 22405, 35848, 44810, 71696, 89620, 179240, 353999, 358480, 707998, 1415996, 1769995, 2831992, 3539990, 5663984, 7079980, 14159960, 28319920]

約数ペア:

[(1, 28319920), (2, 14159960), (4, 7079980), (5, 5663984), (8, 3539990), (10, 2831992), (16, 1769995), (20, 1415996), (40, 707998), (79, 358480), (80, 353999), (158, 179240), (316, 89620), (395, 71696), (632, 44810), (790, 35848), (1264, 22405), (1580, 17924), (3160, 8962), (4481, 6320)]